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Tecnología y ciencias del agua

versão On-line ISSN 2007-2422

Resumo

BEDOYA-CARDOSO, Marlio  e  ANGELES-MONTIEL, Vicente. Determination of localized losses in drip irrigation. Tecnol. cienc. agua [online]. 2017, vol.8, n.4, pp.117-125. ISSN 2007-2422.  http://dx.doi.org/10.24850/j-tyca-2017-04-07.

In this paper an experimental research was carry out to compare the pressure losses caused by the connection on line emitter drip irrigation lateral. The connection losses (minor or localized) were obtained experimentally as the difference between the pressures recorded every 10 meters and friction losses in each length, which were compared with four methodologies; the first is the equation of the kinetic load and coefficient of local losses proposed by Bagarello, Ferro, Provenzano and Pumo (1997), the second proposal by Howell and Barinas (1980), the third proposal by Keller and Bliesner (1990), finally a fourth methodology was proposal to evaluate connection loss equivalent and then it was used in the equation of Keller and Bliesner (1990). The best equation was the proposal by Keller and Bliesner (1990), modified in this work. They reached averages lower errors at 5.0% in whole lateral. Furthermore, because of their versatility, it may be used to determine the stepwise loss analysis or as a multiplier factor with frictional losses in pipes with multiple outlets to determine the total losses in a lateral, procedure cannot be performed with the other methodologies.

Palavras-chave : Outflow; head losses; friction; emitter’s connecting.

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